6PROGRAMMABLE AUXILIARY FUNCTIONSThe MON, SCN, ● , and O keys can be programmed with the functions listedbelow:• AUXPress to activate the auxiliary port. Press again to deactivate the auxiliaryport. Auxiliary is used with optional boards, allowing you to activate anddeactivate these optional functions. While activated, the AUX icon appearson the display.• CH DirectPress and hold for 2 seconds to store the currently selected channel as theDirect Channel. Press at any time to immediately change to the transceiver’sDirect Channel. (The default value for the Direct Channel is the lowestchannel of the lowest group.)• Del/AddPress and hold for 1 second during Scan (while Scan is paused) totemporarily remove or add a channel from/to the Scan list. Press and holdthis key for 1 second while not scanning to permanently remove or add achannel from/to the Scan list. Refer to page 11 for details.• Display CharacterPress to toggle the display between the group number and channel number,and the channel name. If no channel name has been programmed for theselected channel, the group number and channel number will be displayed.• EmergencyPress and hold for 1 second to enter into Emergency Operation 1. While inEmergency Operation 1, press and hold for 1 second to enter EmergencyOperation 2. Press and hold for 10 seconds to exit Emergency Operation.Refer to page 16 for details.• Group DownPress to decrease the group number.• Group UpPress to increase the group number.• Horn AlertPress to activate the Horn Alert function. Refer to page 19 for details.• Key LockPress to lock the transceiver keys. Press again to unlock the keys. Refer topage 19 for details.• LCD BrightnessPress to toggle the display brightness between high and low. The defaultsetting is high.